Question

Write down the observations which indicate the occurrence of a chemical reaction

Answer 1

The following observations will takes place during the chemical reaction.

   Change in physical state, temperature, colour of products, and also evolution of some gases.

   A chemical reaction is a reaction in which a product that has chemical properties that differ from the original reactants is produced.

   The chemical reactions occur in different ways combination, separation, or rearrangement of atoms.

   Although the reaction causes changes at the atomic level, physical changes in the system can sometimes be observed indicating a chemical change is underway.

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